產品描述 Product Description

進口緊急關閉閥、高壓自閉閥利用水作用力自動控制閥門的關閉和開啟的閥門，通常用在消防與生活共用并聯的供水系統中。當消防系統啟動時，管道壓力升高，超過設定值時，能自動關閉生產Imported emergency shut-off valves and high-pressure self closing valves are valves that use water force to automatically control the closing and opening of valves. They are usually used in parallel water supply systems shared by firefighting and daily life. When the fire protection system starts, the pipeline pressure increases, and when it exceeds the set value, it can automatically shut down production

1、當遇到消防用水時，消防泵氣動管中壓力升高時，閥門緊急關閉，切斷生活用水，保證消防用水，當消防結束壓力恢復至生活供水壓力時，閥門處于常開位置。當主閥進口壓力低于導閥設定的壓力時，導閥此時處于開通狀態，主閥上蓋腔內壓力與主閥出口壓力相等，進口與出口存在壓差，水流經閥門進口由出口流出。

     When encountering fire water, when the pressure in the pneumatic pipe of the fire pump rises, the valve will be closed in an emergency manner to cut off domestic water to ensure fire water. When the pressure of the end of fire fighting is restored to the domestic water supply pressure, the valve will be in the normally open position. When the inlet pressure of the main valve is lower than the set pressure of the pilot valve, the pilot valve is now in an open state, and the pressure in the upper cover cavity of the main valve is equal to the outlet pressure of the main valve. There is a pressure difference between the inlet and outlet, and water flows out through the valve inlet and outlet

2、當消防泵或變頻泵壓力升高，導閥設定壓力時，由主閥進口通向導閥控制管壓力升高，作用在彈簧上的壓力增大，向下壓緊帶動閥芯下移，使導閥關閉，此時主閥進口壓力通過節流閥不斷補充到主閥閥蓋上腔，因閥瓣受到向下的壓力大于向上的密封面總作用力，主閥關閉。進口壓力小于設定壓力該閥一直處于開啟狀態，進口壓力大于設定壓力，該閥處于關閉狀態。 

     When the pressure of the fire pump or variable frequency pump rises and the pilot valve set pressure rises, the pressure of the control pipe from the inlet of the main valve to the pilot valve increases, the pressure acting on the spring increases, and the downward compression drives the valve core to move downward to close the pilot valve. At this time, the inlet pressure of the main valve is constantly supplemented to the upper chamber of the main valve bonnet through the throttle valve. Since the downward pressure on the valve disc is greater than the total force on the upward sealing surface, the main valve is closed. If the inlet pressure is less than the set pressure, the valve remains open. If the inlet pressure is greater than the set pressure, the valve is closed.

結構和主要零件材質 Structure and main component materials

主要結構由主閥、過濾器、針閥、導閥、球閥和壓力表以及接管等組成 The main structure consists of main valve, filter, needle valve, pilot valve, ball valve, pressure gauge, and connecting pipe, etc

主要零件材質 Main component materials

工作原理 working principle

1.導閥膜片下腔連接到主閥進口，可以反饋到進口壓力大小。松開導閥防松螺母，順時針轉動導閥調節螺釘，調節彈簧被壓縮，在彈簧作用力下，導閥芯開啟。主閥膜片上腔內水流出，壓力降低，在主閥膜片上下腔壓力差作用下，主閥開啟。開始供水。

  The lower chamber of the pilot valve diaphragm is connected to the main valve inlet, which can provide feedback on the inlet pressure. Loosen the anti loosening nut of the guide valve, turn the adjusting screw of the guide valve clockwise, and the adjusting spring is compressed. Under the force of the spring, the guide valve core opens. Water flows out of the upper chamber of the main valve diaphragm, causing a decrease in pressure. Under the pressure difference between the upper and lower chambers of the main valve diaphragm, the main valve opens. Start water supply

2.當消防供水時，進口壓力上升（消防時用水量大，壓力也高）導閥膜片下腔壓力上升，帶動導閥芯關閉。主閥膜片上腔內水無法排除，壓力上升。在主閥膜片上下腔壓力差作用下，主閥關閉。停止供水。這時所有供水通過消防管道流出，居民生活供水停止，保證了消防用水需求。

  When supplying water for fire protection, the inlet pressure increases (the water consumption during fire protection is high, and the pressure is also high), and the pressure in the lower chamber of the pilot valve diaphragm increases, driving the pilot valve core to close. The water in the upper chamber of the main valve diaphragm cannot be discharged, and the pressure rises. Under the pressure difference between the upper and lower chambers of the main valve diaphragm, the main valve closes. Stop water supply. At this point, all water supply flows out through the firefighting pipeline, and the residents' domestic water supply is stopped, ensuring the demand for firefighting water

3.停止消防供水后，進口壓力下降。導閥膜片下腔壓力也下降，在導閥彈簧力作用下，導閥芯開啟。主閥膜片上腔內水流出，壓力下降，在主閥膜片上下腔壓力差作用下，主閥重新開啟供水，保證生產或生活用水需求。

  After stopping the fire water supply, the inlet pressure decreased. The pressure in the lower chamber of the pilot valve diaphragm also decreases, and under the action of the pilot valve spring force, the pilot valve core opens. Water flows out of the upper chamber of the main valve diaphragm and the pressure drops. Under the pressure difference between the upper and lower chambers of the main valve diaphragm, the main valve reopens for water supply to ensure production or domestic water demand.

全關閉狀態：當主閥進口端水壓分別進入閥體及控制室，且主閥的外部球閥同時關閉，此時主閥處于關閉狀態。

Fully closed state: When the water pressure at the inlet end of the main valve enters the valve body and control room respectively, and the external ball valve of the main valve is closed at the same time, the main valve is in a fully closed state

全開啟狀態：當主閥外部的球閥全開后，此時控制室內水壓全部釋放到管路下游，而主閥也呈現為開啟狀態。

Fully open state: When the ball valve outside the main valve is fully open, all the water pressure in the control room is released to the downstream of the pipeline, and the main valve also shows a fully open state

浮動調節狀態：調節主閥外部的球閥開度，使進水端流向控制室的水流和控制室流向下游的水流達到平衡，此時主閥處于調節浮動狀態。

Floating adjustment state: Adjust the opening of the ball valve outside the main valve to balance the water flow from the inlet end to the control room and the water flow from the control room to the downstream. At this time, the main valve is in the floating adjustment state

流量示意圖 Flow diagram

安裝與調試 Installation and debugging

安裝調試時，把閥門調到設定的關閉壓力。然后逐漸降低進口壓力，觀察閥門開啟時的壓力。然后再增加進口壓力，觀察記錄主閥關閉時壓力。反復調試好后，擰緊導閥防松螺母

During installation and debugging, adjust the valve to the set closing pressure. Then gradually reduce the inlet pressure and observe the pressure when the valve opens. Then increase the inlet pressure and observe and record the pressure when the main valve is closed. After repeated debugging, tighten the guide valve lock nut